Connect your Amazon account

Each seller needs two connections, not one:

Connection	Brings in
Amazon Ads	Advertising data — campaigns, targets, search terms, performance
Selling Partner API (SP-API)	Products, listings and sales

Both belong to the seller, and both are needed. Ads alone tells you what you spent; SP-API is what lets Vendlen know what you sold, which is what makes an economic decision possible.

A fully connected seller. Identifiers shown are demo replacements. The capture predates the current card, which no longer shows the data schedule.

The order matters

Connect Amazon Ads first. It is what gives Vendlen the Seller ID, and SP-API is connected against that ID afterwards.

1. Connect Amazon Ads

Choose Connect Amazon Ads, sign in to Amazon, and approve the access. You are redirected back, and the App lists every seller the authorization can access. Choose Claim this seller on the one you want to sync.

A single authorization may cover several sellers. Claiming one ties this Vendlen seller profile to the Amazon account you want to sync. Only US sellers can be connected.

2. Connect SP-API for that seller

Select Connect SP-API from your Vendlen seller profile. You will be redirected to Amazon to review and authorize the permissions requested by Vendlen. After authorization, Amazon redirects you securely back to Vendlen and the connection will begin syncing.

Each seller authorizes only their own Amazon account. Vendlen does not ask sellers to provide their Amazon password or API credentials.

Reading a connected seller

The seller card shows the state of both connections at a glance:

• Amazon Ads — daily sync, and the date of the latest data it holds.
• Selling Partner API — when its data was last updated and, while history is still arriving, how many days of it have loaded so far.

A Complete badge means both connections are in place; SP-API missing means only Amazon Ads is. One connection alone leaves the seller partially set up, and the parts of Vendlen that need the missing side will not have what they need.

Adding more sellers

Repeat both steps per seller. Ads first, then SP-API against that seller.

Note that every published self-serve plan covers one seller profile — if you operate several, contact Vendlen.

What happens next

Data does not arrive instantly. Advertising history has to be pulled and listings synced before the account has enough for the AI Analyst to say anything useful.

Considerations

• Walmart and TikTok connections are Beta, for shortlisted sellers.
• Vendlen only reads the United States marketplace today. See Marketplace scope.
• Amazon-derived data is permanently deleted within 30 days after the Amazon connection is disconnected or authorization is revoked.
• If a connection drops later, see Amazon connections.